Compressor valve



Dec. 3, 1929.

- F. R. ERBACHy COMPRESSOR VALVE Filed June 17. 1927 A TTORNEY PatentedDec. 3, 1929 .UNITED sii-Aras PA'ENT oi-Ficaf FREDERICK B. ERBACH, FDETROIT, MICHIGAN, .AS-SIGNOR T0 KELVINATOR CORPO- RATION, 0F .'DETBDIT,HICHIGAN, A CORPORATION 0F MICHIGAN COMPREBSCR VALVE Application ledJune 17,

' oiidfsprin and ahousing enclosing the en- `tire unit. oth housingswere provided with outlet ports, but, as theinner housing wasnecessarily movable with respect to the outer housin ,it frequentlymoved to such position that ex aust ports in one or both of the housingswere closed or partially closed by portions of the other housing `thusimpairing the eiiiciency of the compressor..

One obect of my invention is to provide a novel type of exhaust valvewherein the exhaust ports of the housings are always maintained inalignment without interfering 25.* with the proper movement ofthe innerhousin gAnother obect of my invention is toprovide a novel type ofhousing member which is simple, inexpensive to manufacture, and whichlends itself readily` to cooperation with an associated housing toprevent undesirable relative movement therebetween.

- For a more comprehensive understanding of my invention reference maynow be had to the accompanying drawings of which:

Fig. 1 is a cross-sectional view of a portion of a compressor cylinderprovided with andexhaust valve embodying my invention; an

Fig. 2 is a side elevational view of an outer housing member constructedin -accordance Y with my invention; and

Fig. 3 is a bottom plan view of the housing illustrated in Fig. 2; landFi 4 is a plan view of an inner housing mem er constructed in accordancewithmy invention; and Y Fi 5 is a side elevational view of the housingsowninFig.4;and v relation; and

1927. Serial No. 199,442.

Fig. 6 is abottom plan view of the housingillustratcd in Figs. 4 and 5;and

ig. 7 is a perspective view of the inner and outer housings assembled incooperative 55 Fig. 8 is a bottom plan view of the housings assembled asshown in Fig. 7.

Referring first to Fig. 1, have shown a compressor cylinder 10 providedwith a piston 11 and a cylinder head 12. The cylinder head 12 isprovided with an exhaust ort 13, the passage of compressed fluid t roughwhich is regulated b a valve mechanism 14, constructed in accor ancewith my invention. The valve mechanism 14 is enclosed within an outletchamber 15 in a cylinder top 16. A fluid conduit 17 secured to thecylinder top 16 is normally in open communication wit the chamber 15 andserves to connect it to a condensing coil (not shown) of the refriger-lating system.

The cylinder head 12 is provided with an annular raised ortion 18immediately surrounding the ex aust port 13, which serves as a valveseat for a suitable valve closing member 19, and with an annular groove20 immediately surrounding the raised annular valve seat 18.

The valve closing member 19 is a thinilex-` ible metallicdisc and isresiliently held in position upon the seat 18 by means of a' helicalcompression spring 21. A housing member 22 is provided with a centralldepressed portion 23, the face of which is at and serves as. a stopmember for the valve'closing member 19. The depressed portion 23 isprovided with a small opening 23a therein, which serves to prevent theformation of a vacuum between the valve closing member 19 and the faceof the member 23, when they are in engagement. The housing 22 iswalsoprovided with a plurality of spaced integral downwardly lprojectingsupporting legs 24, the

ends of which are adapted to rest in the groove 2O in the cylinder head12. Intermediate the 95 legs 24, the housing 22 has a plurality ofoutwardly ,extendin integral projections 25, for -a purpose tohereinafter explained.

.. The housing22 is .resiliently held in its lowermost position, theends of the legs L00 24 in the bottom of the groove 20, by means of ahelical compression spring 26, the other end ot' which is compressed andheld in position by means of an outer housing` 27. The holising 27 isprovided with a ralsed central portion 28 which engages one end of thespring 2G and which is provided with a central out-A bolts 33.

lAs best shown in Figs. 7 and 8., the spaces between the spaced legs 24of the housing 22 serve as exhaust ports from the housing 22 and thespaces between-the spaced vlegs 31 of the housing 27 serve as exhaustports therefrom. The outwardly extending projections 25 of the housing22 extend between the legs 31 of the housing 27, thus permitting thehousing 22 to move toward and away from the stop portion 30 of thehousing 27 but prevent relative rotative movement of the two housings.

From the foregoing description it will be apparent that the housing 22mayn move freely against the action Iofthe spring 28 toward and awayfrom the valve seat 18 but that the lugs or projections 25 ofthe housing22 moving between the legs 31 of the member 27 will prevent any rotativemovement of the housing- 22, thus retaining the exhaust ports of thehousings 22 and 27 always in alignment and always open. f

Athough I have illustrated but a single form of my invention, and havedescribed in detail but a single application thereof, it will beapparent to those skilled in the art that it is not so limited, but thatvarious modifications and changes may be effected therein-` wlthoutdeparting from the s irit of my invention or from the scope o theappended claims. I claim as my invention 1. Ina discharge valve, a valveseat, an independently reciprocable valve closing member adapted toengage said seat, a spring member adapted to engage said valve closinmember, a reciprocable housing for sai spring member, and meansforlpreventing rotary movement of said housing.

" member and causing itto resiliently engage `said seat, a reciprocablehousing for said spring, and means for preventing rotary movement ofsaid housing.

v3. In a pressure operated discharge valve, 'a valve seat, anindependently reciprocable valve closing member, a springmember engagingsaid valve closing member and causing it to resiliently engage'saidseat, a resiliently mounted reci rocable housing for said spring member,andp means for preventing rotary movement vot' said housing.

4. In a pressure operated discharge valve,

.a valve seat, an independently reciprocable vided with outlet ports,asecond spring member engaging said housing, a stationary housingenclosing said Valve closing member, said reciprocable housing and saidsprings and provided with outlet ports,`and means for maintaining theports in said housings in alignment.

6. In a pressure operated valve for compressors, a valve seat, anindeendently re ciprocable valve closing mem er, a spring member engagingsaid valve closing member, a reciprocable housing enclosin said springmember and valve closing mem er and provided with outlet ports, a secondspring member engaging said housing, a stationary housing enclosing saidvalve closing member, said reciprocable housing and said s rings andprovided with outlet orts, one o said housings being provided withprojections adapted to enter the ports in the other housing.

7. In a pressure operated valve for coin'- pressorsa valve seat, anindependently reciprocable valve closlng member, a spring member enaging said valve closing member,

Va reciproca le housing enclosing said s ring member and valve closing'member an 'provided with outlet ports, a second spring memberengagingsaid housing, a stationaryhousing enclosing said valve closingmember, said reciprocable housing and saidl sprlngs and rovided withoutlet ports, said reciprocable ousin being provided with projectionsadapte to enter the ports in said stationary housing.

8. In4 a pressure operated valve for compressors, a valve seat, an indeendently reciprocable valve closing mem er, a spring member engagingsaid valve closing member, a reciprocable housing provided wlth spacedlegs enclosin said s ring member and valve closing mem er, an tralportion adapted to act as a stop member for said valve closing member, asecond spring member engaging said housing, a stationary 'zol with adepressed cenhousing member enclosing all of said valve parts andprovided with spaced supporting legs, and means for maintaining thesupporting legs of said housings in radial alignment. 9. In a pressureoperated compressor valve, a cylinder head provided with an exhaust portand valve seat, an independently reciprocable valve closing member, 'aspring member engaging sald valve closlng member,

a loosely mounted reciprocabie housing pro-v vided with spacedsupporting legs enclosing said spring member and valve closing memberand with a depressed central portion adapted to act as a stop member forsaid valve closing member, a second spring member en" gaging saidhousing, a stationary housing member enclosing said last named springmember and provided with spacedsupporting legs surrounding saidreeiprocable housing, and means for securing the legs of the outerhousing to the cylinder head,'said reciprocable housing being providedwith means preventing rotative movement thereof.

10. In a pressure operated compressor valve, a cylinder head providedWith an exhaust' port having a valve seat associated therewith, -anannular said exhaust port, an in ependently reciprocable valveA closingmember, a spring engaging said valve closing member, a reciprocablehousing provided with spaced supporting v legs enclosing said spring andsaid valve clos- Y ing member and adapted to rest in said groove, aspring engaging said housing and tending to retain said legs in saidgroove, va stationary housing enclosing said last named spring memberland provided with spaced supporting legs enclosing said first mentionedhousing and means for vsecuring the le of said stationary outer housingto the cylinder head, said inner reciprocable housing being providedwith outwardly extending projections adapted to fit between the legs ofsaid stationary housing.

In testimony w ereof I hereunto aix my signature.

FREDERICK R. ERBACH.

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